src/kitemviews/kitemlistcontroller.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2011 Peter Penz <peter.penz19@gmail.com>
   3  * SPDX-FileCopyrightText: 2012 Frank Reininghaus <frank78ac@googlemail.com>
   4  *
   5  * Based on the Itemviews NG project from Trolltech Labs
   6  *
   7  * SPDX-License-Identifier: GPL-2.0-or-later
   8  */
   9
  10 #include "kitemlistcontroller.h"
  11
  12 #include "kitemlistselectionmanager.h"
  13 #include "kitemlistview.h"
  14 #include "private/kitemlistkeyboardsearchmanager.h"
  15 #include "private/kitemlistrubberband.h"
  16 #include "views/draganddrophelper.h"
  17
  18 #include <KTwoFingerSwipe>
  19 #include <KTwoFingerTap>
  20 #include <KUrlMimeData>
  21
  22 #include <QAccessible>
  23 #include <QApplication>
  24 #include <QDrag>
  25 #include <QGesture>
  26 #include <QGraphicsScene>
  27 #include <QGraphicsSceneEvent>
  28 #include <QGraphicsView>
  29 #include <QMimeData>
  30 #include <QTimer>
  31 #include <QTouchEvent>
  32
  33 KItemListController::KItemListController(KItemModelBase *model, KItemListView *view, QObject *parent)
  34     : QObject(parent)
  35     , m_singleClickActivationEnforced(false)
  36     , m_selectionMode(false)
  37     , m_selectionTogglePressed(false)
  38     , m_clearSelectionIfItemsAreNotDragged(false)
  39     , m_isSwipeGesture(false)
  40     , m_dragActionOrRightClick(false)
  41     , m_scrollerIsScrolling(false)
  42     , m_pinchGestureInProgress(false)
  43     , m_mousePress(false)
  44     , m_isTouchEvent(false)
  45     , m_selectionBehavior(NoSelection)
  46     , m_autoActivationBehavior(ActivationAndExpansion)
  47     , m_mouseDoubleClickAction(ActivateItemOnly)
  48     , m_model(nullptr)
  49     , m_view(nullptr)
  50     , m_selectionManager(new KItemListSelectionManager(this))
  51     , m_keyboardManager(new KItemListKeyboardSearchManager(this))
  52     , m_pressedIndex(std::nullopt)
  53     , m_pressedMouseGlobalPos()
  54     , m_autoActivationTimer(nullptr)
  55     , m_swipeGesture(Qt::CustomGesture)
  56     , m_twoFingerTapGesture(Qt::CustomGesture)
  57     , m_oldSelection()
  58     , m_keyboardAnchorIndex(-1)
  59     , m_keyboardAnchorPos(0)
  60 {
  61     connect(m_keyboardManager, &KItemListKeyboardSearchManager::changeCurrentItem, this, &KItemListController::slotChangeCurrentItem);
  62     connect(m_selectionManager, &KItemListSelectionManager::currentChanged, m_keyboardManager, &KItemListKeyboardSearchManager::slotCurrentChanged);
  63     connect(m_selectionManager, &KItemListSelectionManager::selectionChanged, m_keyboardManager, &KItemListKeyboardSearchManager::slotSelectionChanged);
  64
  65     m_autoActivationTimer = new QTimer(this);
  66     m_autoActivationTimer->setSingleShot(true);
  67     m_autoActivationTimer->setInterval(-1);
  68     connect(m_autoActivationTimer, &QTimer::timeout, this, &KItemListController::slotAutoActivationTimeout);
  69
  70     setModel(model);
  71     setView(view);
  72
  73     m_swipeGesture = QGestureRecognizer::registerRecognizer(new KTwoFingerSwipeRecognizer());
  74     m_twoFingerTapGesture = QGestureRecognizer::registerRecognizer(new KTwoFingerTapRecognizer());
  75     view->grabGesture(m_swipeGesture);
  76     view->grabGesture(m_twoFingerTapGesture);
  77     view->grabGesture(Qt::TapGesture);
  78     view->grabGesture(Qt::TapAndHoldGesture);
  79     view->grabGesture(Qt::PinchGesture);
  80 }
  81
  82 KItemListController::~KItemListController()
  83 {
  84     setView(nullptr);
  85     Q_ASSERT(!m_view);
  86
  87     setModel(nullptr);
  88     Q_ASSERT(!m_model);
  89 }
  90
  91 void KItemListController::setModel(KItemModelBase *model)
  92 {
  93     if (m_model == model) {
  94         return;
  95     }
  96
  97     KItemModelBase *oldModel = m_model;
  98     if (oldModel) {
  99         oldModel->deleteLater();
 100     }
 101
 102     m_model = model;
 103     if (m_model) {
 104         m_model->setParent(this);
 105     }
 106
 107     if (m_view) {
 108         m_view->setModel(m_model);
 109     }
 110
 111     m_selectionManager->setModel(m_model);
 112
 113     Q_EMIT modelChanged(m_model, oldModel);
 114 }
 115
 116 KItemModelBase *KItemListController::model() const
 117 {
 118     return m_model;
 119 }
 120
 121 KItemListSelectionManager *KItemListController::selectionManager() const
 122 {
 123     return m_selectionManager;
 124 }
 125
 126 void KItemListController::setView(KItemListView *view)
 127 {
 128     if (m_view == view) {
 129         return;
 130     }
 131
 132     KItemListView *oldView = m_view;
 133     if (oldView) {
 134         disconnect(oldView, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 135         oldView->deleteLater();
 136     }
 137
 138     m_view = view;
 139
 140     if (m_view) {
 141         m_view->setParent(this);
 142         m_view->setController(this);
 143         m_view->setModel(m_model);
 144         connect(m_view, &KItemListView::scrollOffsetChanged, this, &KItemListController::slotViewScrollOffsetChanged);
 145         updateExtendedSelectionRegion();
 146     }
 147
 148     Q_EMIT viewChanged(m_view, oldView);
 149 }
 150
 151 KItemListView *KItemListController::view() const
 152 {
 153     return m_view;
 154 }
 155
 156 void KItemListController::setSelectionBehavior(SelectionBehavior behavior)
 157 {
 158     m_selectionBehavior = behavior;
 159     updateExtendedSelectionRegion();
 160 }
 161
 162 KItemListController::SelectionBehavior KItemListController::selectionBehavior() const
 163 {
 164     return m_selectionBehavior;
 165 }
 166
 167 void KItemListController::setAutoActivationBehavior(AutoActivationBehavior behavior)
 168 {
 169     m_autoActivationBehavior = behavior;
 170 }
 171
 172 KItemListController::AutoActivationBehavior KItemListController::autoActivationBehavior() const
 173 {
 174     return m_autoActivationBehavior;
 175 }
 176
 177 void KItemListController::setMouseDoubleClickAction(MouseDoubleClickAction action)
 178 {
 179     m_mouseDoubleClickAction = action;
 180 }
 181
 182 KItemListController::MouseDoubleClickAction KItemListController::mouseDoubleClickAction() const
 183 {
 184     return m_mouseDoubleClickAction;
 185 }
 186
 187 int KItemListController::indexCloseToMousePressedPosition() const
 188 {
 189     const QPointF pressedMousePos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
 190
 191     QHashIterator<KItemListWidget *, KItemListGroupHeader *> it(m_view->m_visibleGroups);
 192     while (it.hasNext()) {
 193         it.next();
 194         KItemListGroupHeader *groupHeader = it.value();
 195         const QPointF mappedToGroup = groupHeader->mapFromItem(nullptr, pressedMousePos);
 196         if (groupHeader->contains(mappedToGroup)) {
 197             return it.key()->index();
 198         }
 199     }
 200     return -1;
 201 }
 202
 203 void KItemListController::setAutoActivationDelay(int delay)
 204 {
 205     m_autoActivationTimer->setInterval(delay);
 206 }
 207
 208 int KItemListController::autoActivationDelay() const
 209 {
 210     return m_autoActivationTimer->interval();
 211 }
 212
 213 void KItemListController::setSingleClickActivationEnforced(bool singleClick)
 214 {
 215     m_singleClickActivationEnforced = singleClick;
 216 }
 217
 218 bool KItemListController::singleClickActivationEnforced() const
 219 {
 220     return m_singleClickActivationEnforced;
 221 }
 222
 223 void KItemListController::setSelectionModeEnabled(bool enabled)
 224 {
 225     m_selectionMode = enabled;
 226 }
 227
 228 bool KItemListController::selectionMode() const
 229 {
 230     return m_selectionMode;
 231 }
 232
 233 bool KItemListController::isSearchAsYouTypeActive() const
 234 {
 235     return m_keyboardManager->isSearchAsYouTypeActive();
 236 }
 237
 238 bool KItemListController::keyPressEvent(QKeyEvent *event)
 239 {
 240     int index = m_selectionManager->currentItem();
 241     int key = event->key();
 242     const bool shiftPressed = event->modifiers() & Qt::ShiftModifier;
 243
 244     const bool horizontalScrolling = m_view->scrollOrientation() == Qt::Horizontal;
 245
 246     // Handle the expanding/collapsing of items
 247     // expand / collapse all selected directories
 248     if (m_view->supportsItemExpanding() && m_model->isExpandable(index) && (key == Qt::Key_Right || key == Qt::Key_Left)) {
 249         const bool expandOrCollapse = key == Qt::Key_Right ? true : false;
 250         bool shouldReturn = m_model->setExpanded(index, expandOrCollapse);
 251
 252         // edit in reverse to preserve index of the first handled items
 253         const auto selectedItems = m_selectionManager->selectedItems();
 254         for (auto it = selectedItems.rbegin(); it != selectedItems.rend(); ++it) {
 255             shouldReturn |= m_model->setExpanded(*it, expandOrCollapse);
 256             if (!shiftPressed) {
 257                 m_selectionManager->setSelected(*it);
 258             }
 259         }
 260         if (shouldReturn) {
 261             // update keyboard anchors
 262             if (shiftPressed) {
 263                 m_keyboardAnchorIndex = selectedItems.count() > 0 ? qMin(index, selectedItems.last()) : index;
 264                 m_keyboardAnchorPos = keyboardAnchorPos(m_keyboardAnchorIndex);
 265             }
 266
 267             event->ignore();
 268             return true;
 269         }
 270     }
 271
 272     const bool controlPressed = event->modifiers() & Qt::ControlModifier;
 273     const bool shiftOrControlPressed = shiftPressed || controlPressed;
 274     const bool navigationPressed = key == Qt::Key_Home || key == Qt::Key_End || key == Qt::Key_PageUp || key == Qt::Key_PageDown || key == Qt::Key_Up
 275         || key == Qt::Key_Down || key == Qt::Key_Left || key == Qt::Key_Right;
 276
 277     const int itemCount = m_model->count();
 278
 279     // For horizontal scroll orientation, transform
 280     // the arrow keys to simplify the event handling.
 281     if (horizontalScrolling) {
 282         switch (key) {
 283         case Qt::Key_Up:
 284             key = Qt::Key_Left;
 285             break;
 286         case Qt::Key_Down:
 287             key = Qt::Key_Right;
 288             break;
 289         case Qt::Key_Left:
 290             key = Qt::Key_Up;
 291             break;
 292         case Qt::Key_Right:
 293             key = Qt::Key_Down;
 294             break;
 295         default:
 296             break;
 297         }
 298     }
 299
 300     if (m_view->layoutDirection() == Qt::RightToLeft) {
 301         if (horizontalScrolling) {
 302             // swap up and down arrow keys
 303             switch (key) {
 304             case Qt::Key_Up:
 305                 key = Qt::Key_Down;
 306                 break;
 307             case Qt::Key_Down:
 308                 key = Qt::Key_Up;
 309                 break;
 310             default:
 311                 break;
 312             }
 313         } else if (!m_view->supportsItemExpanding()) {
 314             // swap left and right arrow keys
 315             switch (key) {
 316             case Qt::Key_Left:
 317                 key = Qt::Key_Right;
 318                 break;
 319             case Qt::Key_Right:
 320                 key = Qt::Key_Left;
 321                 break;
 322             default:
 323                 break;
 324             }
 325         }
 326     }
 327
 328     const bool selectSingleItem = m_selectionBehavior != NoSelection && itemCount == 1 && navigationPressed;
 329
 330     if (selectSingleItem) {
 331         const int current = m_selectionManager->currentItem();
 332         m_selectionManager->setSelected(current);
 333         return true;
 334     }
 335
 336     switch (key) {
 337     case Qt::Key_Home:
 338         index = 0;
 339         m_keyboardAnchorIndex = index;
 340         m_keyboardAnchorPos = keyboardAnchorPos(index);
 341         break;
 342
 343     case Qt::Key_End:
 344         index = itemCount - 1;
 345         m_keyboardAnchorIndex = index;
 346         m_keyboardAnchorPos = keyboardAnchorPos(index);
 347         break;
 348
 349     case Qt::Key_Left:
 350         if (index > 0) {
 351             const int expandedParentsCount = m_model->expandedParentsCount(index);
 352             if (expandedParentsCount == 0) {
 353                 --index;
 354             } else {
 355                 // Go to the parent of the current item.
 356                 do {
 357                     --index;
 358                 } while (index > 0 && m_model->expandedParentsCount(index) == expandedParentsCount);
 359             }
 360             m_keyboardAnchorIndex = index;
 361             m_keyboardAnchorPos = keyboardAnchorPos(index);
 362         }
 363         break;
 364
 365     case Qt::Key_Right:
 366         if (index < itemCount - 1) {
 367             ++index;
 368             m_keyboardAnchorIndex = index;
 369             m_keyboardAnchorPos = keyboardAnchorPos(index);
 370         }
 371         break;
 372
 373     case Qt::Key_Up:
 374         updateKeyboardAnchor();
 375         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 376             m_selectionManager->beginAnchoredSelection(index);
 377         }
 378         index = previousRowIndex(index);
 379         break;
 380
 381     case Qt::Key_Down:
 382         updateKeyboardAnchor();
 383         if (shiftPressed && !m_selectionManager->isAnchoredSelectionActive() && m_selectionManager->isSelected(index)) {
 384             m_selectionManager->beginAnchoredSelection(index);
 385         }
 386         index = nextRowIndex(index);
 387         break;
 388
 389     case Qt::Key_PageUp:
 390         if (horizontalScrolling) {
 391             // The new current index should correspond to the first item in the current column.
 392             int newIndex = qMax(index - 1, 0);
 393             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() < m_view->itemRect(index).topLeft().y()) {
 394                 index = newIndex;
 395                 newIndex = qMax(index - 1, 0);
 396             }
 397             m_keyboardAnchorIndex = index;
 398             m_keyboardAnchorPos = keyboardAnchorPos(index);
 399         } else {
 400             const qreal currentItemBottom = m_view->itemRect(index).bottomLeft().y();
 401             const qreal height = m_view->geometry().height();
 402
 403             // The new current item should be the first item in the current
 404             // column whose itemRect's top coordinate is larger than targetY.
 405             const qreal targetY = currentItemBottom - height;
 406
 407             updateKeyboardAnchor();
 408             int newIndex = previousRowIndex(index);
 409             do {
 410                 index = newIndex;
 411                 updateKeyboardAnchor();
 412                 newIndex = previousRowIndex(index);
 413             } while (m_view->itemRect(newIndex).topLeft().y() > targetY && newIndex != index);
 414         }
 415         break;
 416
 417     case Qt::Key_PageDown:
 418         if (horizontalScrolling) {
 419             // The new current index should correspond to the last item in the current column.
 420             int newIndex = qMin(index + 1, m_model->count() - 1);
 421             while (newIndex != index && m_view->itemRect(newIndex).topLeft().y() > m_view->itemRect(index).topLeft().y()) {
 422                 index = newIndex;
 423                 newIndex = qMin(index + 1, m_model->count() - 1);
 424             }
 425             m_keyboardAnchorIndex = index;
 426             m_keyboardAnchorPos = keyboardAnchorPos(index);
 427         } else {
 428             const qreal currentItemTop = m_view->itemRect(index).topLeft().y();
 429             const qreal height = m_view->geometry().height();
 430
 431             // The new current item should be the last item in the current
 432             // column whose itemRect's bottom coordinate is smaller than targetY.
 433             const qreal targetY = currentItemTop + height;
 434
 435             updateKeyboardAnchor();
 436             int newIndex = nextRowIndex(index);
 437             do {
 438                 index = newIndex;
 439                 updateKeyboardAnchor();
 440                 newIndex = nextRowIndex(index);
 441             } while (m_view->itemRect(newIndex).bottomLeft().y() < targetY && newIndex != index);
 442         }
 443         break;
 444
 445     case Qt::Key_Enter:
 446     case Qt::Key_Return: {
 447         const KItemSet selectedItems = m_selectionManager->selectedItems();
 448         if (selectedItems.count() >= 2) {
 449             Q_EMIT itemsActivated(selectedItems);
 450         } else if (selectedItems.count() == 1) {
 451             Q_EMIT itemActivated(selectedItems.first());
 452         } else {
 453             Q_EMIT itemActivated(index);
 454         }
 455         break;
 456     }
 457
 458     case Qt::Key_Escape:
 459         if (m_selectionMode) {
 460             Q_EMIT selectionModeChangeRequested(false);
 461         } else if (m_selectionBehavior != SingleSelection) {
 462             m_selectionManager->clearSelection();
 463         }
 464         m_keyboardManager->cancelSearch();
 465         Q_EMIT escapePressed();
 466         break;
 467
 468     case Qt::Key_Space:
 469         if (m_selectionBehavior == MultiSelection) {
 470             if (controlPressed) {
 471                 // Toggle the selection state of the current item.
 472                 m_selectionManager->endAnchoredSelection();
 473                 m_selectionManager->setSelected(index, 1, KItemListSelectionManager::Toggle);
 474                 m_selectionManager->beginAnchoredSelection(index);
 475                 break;
 476             } else {
 477                 // Select the current item if it is not selected yet.
 478                 const int current = m_selectionManager->currentItem();
 479                 if (!m_selectionManager->isSelected(current)) {
 480                     m_selectionManager->setSelected(current);
 481                     break;
 482                 }
 483             }
 484         }
 485         Q_FALLTHROUGH(); // fall through to the default case and add the Space to the current search string.
 486     default:
 487         m_keyboardManager->addKeys(event->text());
 488         // Make sure unconsumed events get propagated up the chain. #302329
 489         event->ignore();
 490         return false;
 491     }
 492
 493     if (m_selectionManager->currentItem() != index) {
 494         switch (m_selectionBehavior) {
 495         case NoSelection:
 496             m_selectionManager->setCurrentItem(index);
 497             break;
 498
 499         case SingleSelection:
 500             m_selectionManager->setCurrentItem(index);
 501             m_selectionManager->clearSelection();
 502             m_selectionManager->setSelected(index, 1);
 503             break;
 504
 505         case MultiSelection:
 506             if (controlPressed) {
 507                 m_selectionManager->endAnchoredSelection();
 508             }
 509
 510             m_selectionManager->setCurrentItem(index);
 511
 512             if (!shiftOrControlPressed) {
 513                 m_selectionManager->clearSelection();
 514                 m_selectionManager->setSelected(index, 1);
 515             }
 516
 517             if (!shiftPressed) {
 518                 m_selectionManager->beginAnchoredSelection(index);
 519             }
 520             break;
 521         }
 522     }
 523
 524     if (navigationPressed) {
 525         m_view->scrollToItem(index);
 526     }
 527     return true;
 528 }
 529
 530 void KItemListController::slotChangeCurrentItem(const QString &text, bool searchFromNextItem)
 531 {
 532     if (!m_model || m_model->count() == 0) {
 533         return;
 534     }
 535     int index;
 536     if (searchFromNextItem) {
 537         const int currentIndex = m_selectionManager->currentItem();
 538         index = m_model->indexForKeyboardSearch(text, (currentIndex + 1) % m_model->count());
 539     } else {
 540         index = m_model->indexForKeyboardSearch(text, 0);
 541     }
 542     if (index >= 0) {
 543         m_selectionManager->setCurrentItem(index);
 544
 545         if (m_selectionBehavior != NoSelection) {
 546             m_selectionManager->replaceSelection(index);
 547             m_selectionManager->beginAnchoredSelection(index);
 548         }
 549
 550         m_view->scrollToItem(index, KItemListView::ViewItemPosition::Beginning);
 551     }
 552 }
 553
 554 void KItemListController::slotAutoActivationTimeout()
 555 {
 556     if (!m_model || !m_view) {
 557         return;
 558     }
 559
 560     const int index = m_autoActivationTimer->property("index").toInt();
 561     if (index < 0 || index >= m_model->count()) {
 562         return;
 563     }
 564
 565     /* m_view->isUnderMouse() fixes a bug in the Folder-View-Panel and in the
 566      * Places-Panel.
 567      *
 568      * Bug: When you drag a file onto a Folder-View-Item or a Places-Item and
 569      * then move away before the auto-activation timeout triggers, than the
 570      * item still becomes activated/expanded.
 571      *
 572      * See Bug 293200 and 305783
 573      */
 574     if (m_view->isUnderMouse()) {
 575         if (m_view->supportsItemExpanding() && m_model->isExpandable(index)) {
 576             const bool expanded = m_model->isExpanded(index);
 577             m_model->setExpanded(index, !expanded);
 578         } else if (m_autoActivationBehavior != ExpansionOnly) {
 579             Q_EMIT itemActivated(index);
 580         }
 581     }
 582 }
 583
 584 bool KItemListController::inputMethodEvent(QInputMethodEvent *event)
 585 {
 586     Q_UNUSED(event)
 587     return false;
 588 }
 589
 590 bool KItemListController::mousePressEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 591 {
 592     m_mousePress = true;
 593     m_pressedMouseGlobalPos = event->screenPos();
 594
 595     if (event->source() == Qt::MouseEventSynthesizedByQt && m_isTouchEvent) {
 596         return false;
 597     }
 598
 599     if (!m_view) {
 600         return false;
 601     }
 602
 603     const QPointF pressedMousePos = transform.map(event->pos());
 604     m_pressedIndex = m_view->itemAt(pressedMousePos);
 605
 606     const Qt::MouseButtons buttons = event->buttons();
 607
 608     if (!onPress(event->pos(), event->modifiers(), buttons)) {
 609         startRubberBand();
 610         return false;
 611     }
 612
 613     return true;
 614 }
 615
 616 bool KItemListController::mouseMoveEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 617 {
 618     if (!m_view) {
 619         return false;
 620     }
 621
 622     if (m_view->m_tapAndHoldIndicator->isActive()) {
 623         m_view->m_tapAndHoldIndicator->setActive(false);
 624     }
 625
 626     if (event->source() == Qt::MouseEventSynthesizedByQt && !m_dragActionOrRightClick && m_isTouchEvent) {
 627         return false;
 628     }
 629
 630     if (m_pressedIndex.has_value() && !m_view->rubberBand()->isActive()) {
 631         // Check whether a dragging should be started
 632         if (event->buttons() & Qt::LeftButton) {
 633             const auto distance = (event->screenPos() - m_pressedMouseGlobalPos).manhattanLength();
 634             if (distance >= QApplication::startDragDistance()) {
 635                 if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
 636                     // Always assure that the dragged item gets selected. Usually this is already
 637                     // done on the mouse-press event, but when using the selection-toggle on a
 638                     // selected item the dragged item is not selected yet.
 639                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
 640                 } else {
 641                     // A selected item has been clicked to drag all selected items
 642                     // -> the selection should not be cleared when the mouse button is released.
 643                     m_clearSelectionIfItemsAreNotDragged = false;
 644                 }
 645                 startDragging();
 646                 m_mousePress = false;
 647             }
 648         }
 649     } else {
 650         KItemListRubberBand *rubberBand = m_view->rubberBand();
 651         if (rubberBand->isActive()) {
 652             QPointF endPos = transform.map(event->pos());
 653
 654             // Update the current item.
 655             const std::optional<int> newCurrent = m_view->itemAt(endPos);
 656             if (newCurrent.has_value()) {
 657                 // It's expected that the new current index is also the new anchor (bug 163451).
 658                 m_selectionManager->endAnchoredSelection();
 659                 m_selectionManager->setCurrentItem(newCurrent.value());
 660                 m_selectionManager->beginAnchoredSelection(newCurrent.value());
 661             }
 662
 663             if (m_view->scrollOrientation() == Qt::Vertical) {
 664                 endPos.ry() += m_view->scrollOffset();
 665             } else {
 666                 endPos.rx() += m_view->scrollOffset();
 667             }
 668             rubberBand->setEndPosition(endPos);
 669         }
 670     }
 671
 672     return false;
 673 }
 674
 675 bool KItemListController::mouseReleaseEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 676 {
 677     m_mousePress = false;
 678     m_isTouchEvent = false;
 679
 680     if (!m_view) {
 681         return false;
 682     }
 683
 684     if (m_view->m_tapAndHoldIndicator->isActive()) {
 685         m_view->m_tapAndHoldIndicator->setActive(false);
 686     }
 687
 688     KItemListRubberBand *rubberBand = m_view->rubberBand();
 689     if (event->source() == Qt::MouseEventSynthesizedByQt && !rubberBand->isActive() && m_isTouchEvent) {
 690         return false;
 691     }
 692
 693     Q_EMIT mouseButtonReleased(m_pressedIndex.value_or(-1), event->buttons());
 694
 695     return onRelease(transform.map(event->pos()), event->modifiers(), event->button(), false);
 696 }
 697
 698 bool KItemListController::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event, const QTransform &transform)
 699 {
 700     const QPointF pos = transform.map(event->pos());
 701     const std::optional<int> index = m_view->itemAt(pos);
 702
 703     // Expand item if desired - See Bug 295573
 704     if (m_mouseDoubleClickAction != ActivateItemOnly) {
 705         if (m_view && m_model && m_view->supportsItemExpanding() && m_model->isExpandable(index.value_or(-1))) {
 706             const bool expanded = m_model->isExpanded(index.value());
 707             m_model->setExpanded(index.value(), !expanded);
 708         }
 709     }
 710
 711     if (event->button() & Qt::RightButton) {
 712         return false;
 713     }
 714
 715     if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
 716         return false;
 717     }
 718
 719     const bool emitItemActivated = index.has_value() && index.value() < m_model->count() && !m_view->isAboveExpansionToggle(index.value(), pos);
 720     if (emitItemActivated) {
 721         Q_EMIT itemActivated(index.value());
 722     }
 723     return false;
 724 }
 725
 726 bool KItemListController::contextMenuEvent(QContextMenuEvent *event)
 727 {
 728     if (event->reason() == QContextMenuEvent::Keyboard) {
 729         // Emit the signal itemContextMenuRequested() if at least one item is selected.
 730         // Otherwise the signal viewContextMenuRequested() will be emitted.
 731         const KItemSet selectedItems = m_selectionManager->selectedItems();
 732         int index = -1;
 733         if (selectedItems.count() >= 2) {
 734             const int currentItemIndex = m_selectionManager->currentItem();
 735             index = selectedItems.contains(currentItemIndex) ? currentItemIndex : selectedItems.first();
 736         } else if (selectedItems.count() == 1) {
 737             index = selectedItems.first();
 738         }
 739
 740         if (index >= 0) {
 741             const QRectF contextRect = m_view->itemContextRect(index);
 742             const QPointF pos(m_view->scene()->views().first()->mapToGlobal(contextRect.bottomRight().toPoint()));
 743             Q_EMIT itemContextMenuRequested(index, pos);
 744         } else {
 745             Q_EMIT viewContextMenuRequested(event->globalPos());
 746         }
 747         return true;
 748     }
 749
 750     const auto pos = event->pos();
 751     const auto globalPos = event->globalPos();
 752
 753     if (m_view->headerBoundaries().contains(pos)) {
 754         Q_EMIT headerContextMenuRequested(globalPos);
 755         return true;
 756     }
 757
 758     const auto pressedItem = m_view->itemAt(pos);
 759     // We only open a context menu for the pressed item if it is selected.
 760     // That's because the same click might have de-selected the item or because the press was only in the row of the item but not on it.
 761     if (pressedItem && m_selectionManager->selectedItems().contains(pressedItem.value())) {
 762         // The selection rectangle for an item was clicked
 763         Q_EMIT itemContextMenuRequested(pressedItem.value(), globalPos);
 764         return true;
 765     }
 766
 767     // Remove any hover highlights so the context menu doesn't look like it applies to a row.
 768     const auto widgets = m_view->visibleItemListWidgets();
 769     for (KItemListWidget *widget : widgets) {
 770         if (widget->isHovered()) {
 771             widget->setHovered(false);
 772             Q_EMIT itemUnhovered(widget->index());
 773         }
 774     }
 775     Q_EMIT viewContextMenuRequested(globalPos);
 776     return true;
 777 }
 778
 779 bool KItemListController::dragEnterEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 780 {
 781     Q_UNUSED(event)
 782     Q_UNUSED(transform)
 783
 784     DragAndDropHelper::clearUrlListMatchesUrlCache();
 785
 786     return false;
 787 }
 788
 789 bool KItemListController::dragLeaveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 790 {
 791     Q_UNUSED(event)
 792     Q_UNUSED(transform)
 793
 794     m_autoActivationTimer->stop();
 795     m_view->setAutoScroll(false);
 796     m_view->hideDropIndicator();
 797
 798     KItemListWidget *widget = hoveredWidget();
 799     if (widget) {
 800         widget->setHovered(false);
 801         Q_EMIT itemUnhovered(widget->index());
 802     }
 803     return false;
 804 }
 805
 806 bool KItemListController::dragMoveEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 807 {
 808     if (!m_model || !m_view) {
 809         return false;
 810     }
 811
 812     QUrl hoveredDir = m_model->directory();
 813     KItemListWidget *oldHoveredWidget = hoveredWidget();
 814
 815     const QPointF pos = transform.map(event->pos());
 816     KItemListWidget *newHoveredWidget = widgetForDropPos(pos);
 817     int index = -1;
 818
 819     if (oldHoveredWidget != newHoveredWidget) {
 820         m_autoActivationTimer->stop();
 821
 822         if (oldHoveredWidget) {
 823             oldHoveredWidget->setHovered(false);
 824             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 825         }
 826     }
 827
 828     if (newHoveredWidget) {
 829         bool droppingBetweenItems = false;
 830         if (m_model->sortRole().isEmpty()) {
 831             // The model supports inserting items between other items.
 832             droppingBetweenItems = (m_view->showDropIndicator(pos) >= 0);
 833         }
 834
 835         index = newHoveredWidget->index();
 836
 837         if (m_model->isDir(index)) {
 838             hoveredDir = m_model->url(index);
 839         }
 840
 841         if (!droppingBetweenItems) {
 842             // Something has been dragged on an item.
 843             m_view->hideDropIndicator();
 844             if (!newHoveredWidget->isHovered()) {
 845                 newHoveredWidget->setHovered(true);
 846                 Q_EMIT itemHovered(index);
 847             }
 848
 849             if (!m_autoActivationTimer->isActive() && m_autoActivationTimer->interval() >= 0 && m_model->canEnterOnHover(index)) {
 850                 m_autoActivationTimer->setProperty("index", index);
 851                 m_autoActivationTimer->start();
 852                 newHoveredWidget->startActivateSoonAnimation(m_autoActivationTimer->remainingTime());
 853             }
 854
 855         } else {
 856             m_autoActivationTimer->stop();
 857             if (newHoveredWidget && newHoveredWidget->isHovered()) {
 858                 newHoveredWidget->setHovered(false);
 859                 Q_EMIT itemUnhovered(index);
 860             }
 861         }
 862     } else {
 863         m_view->hideDropIndicator();
 864     }
 865
 866     if (DragAndDropHelper::urlListMatchesUrl(event->mimeData()->urls(), hoveredDir)) {
 867         event->setDropAction(Qt::IgnoreAction);
 868         event->ignore();
 869     } else {
 870         if (m_model->supportsDropping(index)) {
 871             event->setDropAction(event->proposedAction());
 872             event->accept();
 873         } else {
 874             event->setDropAction(Qt::IgnoreAction);
 875             event->ignore();
 876         }
 877     }
 878     return false;
 879 }
 880
 881 bool KItemListController::dropEvent(QGraphicsSceneDragDropEvent *event, const QTransform &transform)
 882 {
 883     if (!m_view) {
 884         return false;
 885     }
 886
 887     m_autoActivationTimer->stop();
 888     m_view->setAutoScroll(false);
 889
 890     const QPointF pos = transform.map(event->pos());
 891
 892     int dropAboveIndex = -1;
 893     if (m_model->sortRole().isEmpty()) {
 894         // The model supports inserting of items between other items.
 895         dropAboveIndex = m_view->showDropIndicator(pos);
 896     }
 897
 898     if (dropAboveIndex >= 0) {
 899         // Something has been dropped between two items.
 900         m_view->hideDropIndicator();
 901         Q_EMIT aboveItemDropEvent(dropAboveIndex, event);
 902     } else if (!event->mimeData()->hasFormat(m_model->blacklistItemDropEventMimeType())) {
 903         // Something has been dropped on an item or on an empty part of the view.
 904         const KItemListWidget *receivingWidget = widgetForDropPos(pos);
 905         if (receivingWidget) {
 906             Q_EMIT itemDropEvent(receivingWidget->index(), event);
 907         } else {
 908             Q_EMIT itemDropEvent(-1, event);
 909         }
 910     }
 911
 912     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropEnd);
 913     QAccessible::updateAccessibility(&accessibilityEvent);
 914
 915     return true;
 916 }
 917
 918 bool KItemListController::hoverEnterEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 919 {
 920     Q_UNUSED(event)
 921     Q_UNUSED(transform)
 922     return false;
 923 }
 924
 925 bool KItemListController::hoverMoveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
 926 {
 927     Q_UNUSED(transform)
 928     if (!m_model || !m_view) {
 929         return false;
 930     }
 931
 932     // We identify the widget whose expansionArea had been hovered before this hoverMoveEvent() triggered.
 933     // we can't use hoveredWidget() here (it handles the icon+text rect, not the expansion rect)
 934     // like hoveredWidget(), we find the hovered widget for the expansion rect
 935     const auto visibleItemListWidgets = m_view->visibleItemListWidgets();
 936     const auto oldHoveredExpansionWidgetIterator = std::find_if(visibleItemListWidgets.begin(), visibleItemListWidgets.end(), [](auto &widget) {
 937         return widget->expansionAreaHovered();
 938     });
 939     const auto oldHoveredExpansionWidget =
 940         oldHoveredExpansionWidgetIterator == visibleItemListWidgets.end() ? std::nullopt : std::make_optional(*oldHoveredExpansionWidgetIterator);
 941
 942     const auto unhoverOldHoveredWidget = [&]() {
 943         if (auto oldHoveredWidget = hoveredWidget(); oldHoveredWidget) {
 944             // handle the text+icon one
 945             oldHoveredWidget->setHovered(false);
 946             Q_EMIT itemUnhovered(oldHoveredWidget->index());
 947         }
 948     };
 949
 950     const auto unhoverOldExpansionWidget = [&]() {
 951         if (oldHoveredExpansionWidget) {
 952             // then the expansion toggle
 953             (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 954         }
 955     };
 956
 957     const QPointF pos = transform.map(event->pos());
 958     if (KItemListWidget *newHoveredWidget = widgetForPos(pos); newHoveredWidget) {
 959         // something got hovered, work out which part and set hover for the appropriate widget
 960         const auto mappedPos = newHoveredWidget->mapFromItem(m_view, pos);
 961         const bool isOnExpansionToggle = newHoveredWidget->expansionToggleRect().contains(mappedPos);
 962
 963         if (isOnExpansionToggle) {
 964             // make sure we unhover the old one first if old!=new
 965             if (oldHoveredExpansionWidget && *oldHoveredExpansionWidget != newHoveredWidget) {
 966                 (*oldHoveredExpansionWidget)->setExpansionAreaHovered(false);
 967             }
 968             // we also unhover any old icon+text hovers, in case the mouse movement from icon+text to expansion toggle is too fast (i.e. newHoveredWidget is never null between the transition)
 969             unhoverOldHoveredWidget();
 970
 971             newHoveredWidget->setExpansionAreaHovered(true);
 972         } else {
 973             // make sure we unhover the old one first if old!=new
 974             auto oldHoveredWidget = hoveredWidget();
 975             if (oldHoveredWidget && oldHoveredWidget != newHoveredWidget) {
 976                 oldHoveredWidget->setHovered(false);
 977                 Q_EMIT itemUnhovered(oldHoveredWidget->index());
 978             }
 979             // we also unhover any old expansion toggle hovers, in case the mouse movement from expansion toggle to icon+text is too fast (i.e. newHoveredWidget is never null between the transition)
 980             unhoverOldExpansionWidget();
 981
 982             const bool isOverIconAndText = newHoveredWidget->iconRect().contains(mappedPos) || newHoveredWidget->textRect().contains(mappedPos);
 983             const bool hasMultipleSelection = m_selectionManager->selectedItems().count() > 1;
 984
 985             if (hasMultipleSelection && !isOverIconAndText) {
 986                 // In case we have multiple selections, clicking on any row will deselect the selection.
 987                 // So, as a visual cue for signalling that clicking anywhere won't select, but clear current highlights,
 988                 // we disable hover of the *row*(i.e. blank space to the right of the icon+text)
 989
 990                 // (no-op in this branch for masked hover)
 991             } else {
 992                 newHoveredWidget->setHoverPosition(mappedPos);
 993                 if (oldHoveredWidget != newHoveredWidget) {
 994                     newHoveredWidget->setHovered(true);
 995                     Q_EMIT itemHovered(newHoveredWidget->index());
 996                 }
 997             }
 998         }
 999     } else {
1000         // unhover any currently hovered expansion and text+icon widgets
1001         unhoverOldHoveredWidget();
1002         unhoverOldExpansionWidget();
1003     }
1004     return false;
1005 }
1006
1007 bool KItemListController::hoverLeaveEvent(QGraphicsSceneHoverEvent *event, const QTransform &transform)
1008 {
1009     Q_UNUSED(event)
1010     Q_UNUSED(transform)
1011
1012     m_mousePress = false;
1013     m_isTouchEvent = false;
1014
1015     if (!m_model || !m_view) {
1016         return false;
1017     }
1018
1019     const auto widgets = m_view->visibleItemListWidgets();
1020     for (KItemListWidget *widget : widgets) {
1021         if (widget->isHovered()) {
1022             widget->setHovered(false);
1023             Q_EMIT itemUnhovered(widget->index());
1024         }
1025     }
1026     return false;
1027 }
1028
1029 bool KItemListController::wheelEvent(QGraphicsSceneWheelEvent *event, const QTransform &transform)
1030 {
1031     Q_UNUSED(event)
1032     Q_UNUSED(transform)
1033     return false;
1034 }
1035
1036 bool KItemListController::resizeEvent(QGraphicsSceneResizeEvent *event, const QTransform &transform)
1037 {
1038     Q_UNUSED(event)
1039     Q_UNUSED(transform)
1040     return false;
1041 }
1042
1043 bool KItemListController::gestureEvent(QGestureEvent *event, const QTransform &transform)
1044 {
1045     if (!m_view) {
1046         return false;
1047     }
1048
1049     //you can touch on different views at the same time, but only one QWidget gets a mousePressEvent
1050     //we use this to get the right QWidget
1051     //the only exception is a tap gesture with state GestureStarted, we need to reset some variable
1052     if (!m_mousePress) {
1053         if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1054             QTapGesture *tapGesture = static_cast<QTapGesture *>(tap);
1055             if (tapGesture->state() == Qt::GestureStarted) {
1056                 tapTriggered(tapGesture, transform);
1057             }
1058         }
1059         return false;
1060     }
1061
1062     bool accepted = false;
1063
1064     if (QGesture *tap = event->gesture(Qt::TapGesture)) {
1065         tapTriggered(static_cast<QTapGesture *>(tap), transform);
1066         accepted = true;
1067     }
1068     if (event->gesture(Qt::TapAndHoldGesture)) {
1069         tapAndHoldTriggered(event, transform);
1070         accepted = true;
1071     }
1072     if (event->gesture(Qt::PinchGesture)) {
1073         pinchTriggered(event, transform);
1074         accepted = true;
1075     }
1076     if (event->gesture(m_swipeGesture)) {
1077         swipeTriggered(event, transform);
1078         accepted = true;
1079     }
1080     if (event->gesture(m_twoFingerTapGesture)) {
1081         twoFingerTapTriggered(event, transform);
1082         accepted = true;
1083     }
1084     return accepted;
1085 }
1086
1087 bool KItemListController::touchBeginEvent(QTouchEvent *event, const QTransform &transform)
1088 {
1089     Q_UNUSED(event)
1090     Q_UNUSED(transform)
1091
1092     m_isTouchEvent = true;
1093     return false;
1094 }
1095
1096 void KItemListController::tapTriggered(QTapGesture *tap, const QTransform &transform)
1097 {
1098     static bool scrollerWasActive = false;
1099
1100     if (tap->state() == Qt::GestureStarted) {
1101         m_dragActionOrRightClick = false;
1102         m_isSwipeGesture = false;
1103         m_pinchGestureInProgress = false;
1104         scrollerWasActive = m_scrollerIsScrolling;
1105     }
1106
1107     if (tap->state() == Qt::GestureFinished) {
1108         m_mousePress = false;
1109
1110         //if at the moment of the gesture start the QScroller was active, the user made the tap
1111         //to stop the QScroller and not to tap on an item
1112         if (scrollerWasActive) {
1113             return;
1114         }
1115
1116         if (m_view->m_tapAndHoldIndicator->isActive()) {
1117             m_view->m_tapAndHoldIndicator->setActive(false);
1118         }
1119
1120         const QPointF pressedMousePos = transform.map(tap->position());
1121         m_pressedIndex = m_view->itemAt(pressedMousePos);
1122         if (m_dragActionOrRightClick) {
1123             m_dragActionOrRightClick = false;
1124         } else {
1125             onPress(tap->position().toPoint(), Qt::NoModifier, Qt::LeftButton);
1126             onRelease(transform.map(tap->position()), Qt::NoModifier, Qt::LeftButton, true);
1127         }
1128         m_isTouchEvent = false;
1129     }
1130 }
1131
1132 void KItemListController::tapAndHoldTriggered(QGestureEvent *event, const QTransform &transform)
1133 {
1134     //the Qt TabAndHold gesture is triggerable with a mouse click, we don't want this
1135     if (!m_isTouchEvent) {
1136         return;
1137     }
1138
1139     const QTapAndHoldGesture *tap = static_cast<QTapAndHoldGesture *>(event->gesture(Qt::TapAndHoldGesture));
1140     if (tap->state() == Qt::GestureFinished) {
1141         //if a pinch gesture is in progress we don't want a TabAndHold gesture
1142         if (m_pinchGestureInProgress) {
1143             return;
1144         }
1145         const QPointF pressedMousePos = transform.map(event->mapToGraphicsScene(tap->position()));
1146         m_pressedIndex = m_view->itemAt(pressedMousePos);
1147         if (m_pressedIndex.has_value()) {
1148             if (!m_selectionManager->isSelected(m_pressedIndex.value())) {
1149                 m_selectionManager->clearSelection();
1150                 m_selectionManager->setSelected(m_pressedIndex.value());
1151             }
1152             if (!m_selectionMode) {
1153                 Q_EMIT selectionModeChangeRequested(true);
1154             }
1155         } else {
1156             m_selectionManager->clearSelection();
1157             startRubberBand();
1158         }
1159
1160         Q_EMIT scrollerStop();
1161
1162         m_view->m_tapAndHoldIndicator->setStartPosition(pressedMousePos);
1163         m_view->m_tapAndHoldIndicator->setActive(true);
1164
1165         m_dragActionOrRightClick = true;
1166     }
1167 }
1168
1169 void KItemListController::pinchTriggered(QGestureEvent *event, const QTransform &transform)
1170 {
1171     Q_UNUSED(transform)
1172
1173     const QPinchGesture *pinch = static_cast<QPinchGesture *>(event->gesture(Qt::PinchGesture));
1174     const qreal sensitivityModifier = 0.2;
1175     static qreal counter = 0;
1176
1177     if (pinch->state() == Qt::GestureStarted) {
1178         m_pinchGestureInProgress = true;
1179         counter = 0;
1180     }
1181     if (pinch->state() == Qt::GestureUpdated) {
1182         //if a swipe gesture was recognized or in progress, we don't want a pinch gesture to change the zoom
1183         if (m_isSwipeGesture) {
1184             return;
1185         }
1186         counter = counter + (pinch->scaleFactor() - 1);
1187         if (counter >= sensitivityModifier) {
1188             Q_EMIT increaseZoom();
1189             counter = 0;
1190         } else if (counter <= -sensitivityModifier) {
1191             Q_EMIT decreaseZoom();
1192             counter = 0;
1193         }
1194     }
1195 }
1196
1197 void KItemListController::swipeTriggered(QGestureEvent *event, const QTransform &transform)
1198 {
1199     Q_UNUSED(transform)
1200
1201     const KTwoFingerSwipe *swipe = static_cast<KTwoFingerSwipe *>(event->gesture(m_swipeGesture));
1202
1203     if (!swipe) {
1204         return;
1205     }
1206     if (swipe->state() == Qt::GestureStarted) {
1207         m_isSwipeGesture = true;
1208     }
1209
1210     if (swipe->state() == Qt::GestureCanceled) {
1211         m_isSwipeGesture = false;
1212     }
1213
1214     if (swipe->state() == Qt::GestureFinished) {
1215         Q_EMIT scrollerStop();
1216
1217         if (swipe->swipeAngle() <= 20 || swipe->swipeAngle() >= 340) {
1218             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::BackButton);
1219         } else if (swipe->swipeAngle() <= 200 && swipe->swipeAngle() >= 160) {
1220             Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), Qt::ForwardButton);
1221         } else if (swipe->swipeAngle() <= 110 && swipe->swipeAngle() >= 60) {
1222             Q_EMIT swipeUp();
1223         }
1224         m_isSwipeGesture = true;
1225     }
1226 }
1227
1228 void KItemListController::twoFingerTapTriggered(QGestureEvent *event, const QTransform &transform)
1229 {
1230     const KTwoFingerTap *twoTap = static_cast<KTwoFingerTap *>(event->gesture(m_twoFingerTapGesture));
1231
1232     if (!twoTap) {
1233         return;
1234     }
1235
1236     if (twoTap->state() == Qt::GestureStarted) {
1237         const QPointF pressedMousePos = transform.map(twoTap->pos());
1238         m_pressedIndex = m_view->itemAt(pressedMousePos);
1239         if (m_pressedIndex.has_value()) {
1240             onPress(twoTap->pos().toPoint(), Qt::ControlModifier, Qt::LeftButton);
1241             onRelease(transform.map(twoTap->pos()), Qt::ControlModifier, Qt::LeftButton, false);
1242         }
1243     }
1244 }
1245
1246 bool KItemListController::processEvent(QEvent *event, const QTransform &transform)
1247 {
1248     if (!event) {
1249         return false;
1250     }
1251
1252     switch (event->type()) {
1253     case QEvent::KeyPress:
1254         return keyPressEvent(static_cast<QKeyEvent *>(event));
1255     case QEvent::InputMethod:
1256         return inputMethodEvent(static_cast<QInputMethodEvent *>(event));
1257     case QEvent::GraphicsSceneMousePress:
1258         return mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1259     case QEvent::GraphicsSceneMouseMove:
1260         return mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1261     case QEvent::GraphicsSceneMouseRelease:
1262         return mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1263     case QEvent::GraphicsSceneMouseDoubleClick:
1264         return mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event), QTransform());
1265     case QEvent::ContextMenu:
1266         return contextMenuEvent(static_cast<QContextMenuEvent *>(event));
1267     case QEvent::GraphicsSceneWheel:
1268         return wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event), QTransform());
1269     case QEvent::GraphicsSceneDragEnter:
1270         return dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1271     case QEvent::GraphicsSceneDragLeave:
1272         return dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1273     case QEvent::GraphicsSceneDragMove:
1274         return dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1275     case QEvent::GraphicsSceneDrop:
1276         return dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event), QTransform());
1277     case QEvent::GraphicsSceneHoverEnter:
1278         return hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1279     case QEvent::GraphicsSceneHoverMove:
1280         return hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1281     case QEvent::GraphicsSceneHoverLeave:
1282         return hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event), QTransform());
1283     case QEvent::GraphicsSceneResize:
1284         return resizeEvent(static_cast<QGraphicsSceneResizeEvent *>(event), transform);
1285     case QEvent::Gesture:
1286         return gestureEvent(static_cast<QGestureEvent *>(event), transform);
1287     case QEvent::TouchBegin:
1288         return touchBeginEvent(static_cast<QTouchEvent *>(event), transform);
1289     default:
1290         break;
1291     }
1292
1293     return false;
1294 }
1295
1296 void KItemListController::slotViewScrollOffsetChanged(qreal current, qreal previous)
1297 {
1298     if (!m_view) {
1299         return;
1300     }
1301
1302     KItemListRubberBand *rubberBand = m_view->rubberBand();
1303     if (rubberBand->isActive()) {
1304         const qreal diff = current - previous;
1305         // TODO: Ideally just QCursor::pos() should be used as
1306         // new end-position but it seems there is no easy way
1307         // to have something like QWidget::mapFromGlobal() for QGraphicsWidget
1308         // (... or I just missed an easy way to do the mapping)
1309         QPointF endPos = rubberBand->endPosition();
1310         if (m_view->scrollOrientation() == Qt::Vertical) {
1311             endPos.ry() += diff;
1312         } else {
1313             endPos.rx() += diff;
1314         }
1315
1316         rubberBand->setEndPosition(endPos);
1317     }
1318 }
1319
1320 void KItemListController::slotRubberBandChanged()
1321 {
1322     if (!m_view || !m_model || m_model->count() <= 0) {
1323         return;
1324     }
1325
1326     const KItemListRubberBand *rubberBand = m_view->rubberBand();
1327     const QPointF startPos = rubberBand->startPosition();
1328     const QPointF endPos = rubberBand->endPosition();
1329     QRectF rubberBandRect = QRectF(startPos, endPos).normalized();
1330
1331     const bool scrollVertical = (m_view->scrollOrientation() == Qt::Vertical);
1332     if (scrollVertical) {
1333         rubberBandRect.translate(0, -m_view->scrollOffset());
1334     } else {
1335         rubberBandRect.translate(-m_view->scrollOffset(), 0);
1336     }
1337
1338     if (!m_oldSelection.isEmpty()) {
1339         // Clear the old selection that was available before the rubberband has
1340         // been activated in case if no Shift- or Control-key are pressed
1341         const bool shiftOrControlPressed = QApplication::keyboardModifiers() & Qt::ShiftModifier || QApplication::keyboardModifiers() & Qt::ControlModifier;
1342         if (!shiftOrControlPressed && !m_selectionMode) {
1343             m_oldSelection.clear();
1344         }
1345     }
1346
1347     KItemSet selectedItems;
1348
1349     // Select all visible items that intersect with the rubberband
1350     const auto widgets = m_view->visibleItemListWidgets();
1351     for (const KItemListWidget *widget : widgets) {
1352         const int index = widget->index();
1353
1354         const QRectF widgetRect = m_view->itemRect(index);
1355         if (widgetRect.intersects(rubberBandRect)) {
1356             // Select the full row intersecting with the rubberband rectangle
1357             const QRectF selectionRect = widget->selectionRect().translated(widgetRect.topLeft());
1358             const QRectF iconRect = widget->iconRect().translated(widgetRect.topLeft());
1359             if (selectionRect.intersects(rubberBandRect) || iconRect.intersects(rubberBandRect)) {
1360                 selectedItems.insert(index);
1361             }
1362         }
1363     }
1364
1365     // Select all invisible items that intersect with the rubberband. Instead of
1366     // iterating all items only the area which might be touched by the rubberband
1367     // will be checked.
1368     const bool increaseIndex = scrollVertical ? startPos.y() > endPos.y() : startPos.x() > endPos.x();
1369
1370     int index = increaseIndex ? m_view->lastVisibleIndex() + 1 : m_view->firstVisibleIndex() - 1;
1371     bool selectionFinished = false;
1372     do {
1373         const QRectF widgetRect = m_view->itemRect(index);
1374         if (widgetRect.intersects(rubberBandRect)) {
1375             selectedItems.insert(index);
1376         }
1377
1378         if (increaseIndex) {
1379             ++index;
1380             selectionFinished = (index >= m_model->count()) || (scrollVertical && widgetRect.top() > rubberBandRect.bottom())
1381                 || (!scrollVertical && widgetRect.left() > rubberBandRect.right());
1382         } else {
1383             --index;
1384             selectionFinished = (index < 0) || (scrollVertical && widgetRect.bottom() < rubberBandRect.top())
1385                 || (!scrollVertical && widgetRect.right() < rubberBandRect.left());
1386         }
1387     } while (!selectionFinished);
1388
1389     if ((QApplication::keyboardModifiers() & Qt::ControlModifier) || m_selectionMode) {
1390         // If Control is pressed, the selection state of all items in the rubberband is toggled.
1391         // Therefore, the new selection contains:
1392         // 1. All previously selected items which are not inside the rubberband, and
1393         // 2. all items inside the rubberband which have not been selected previously.
1394         m_selectionManager->setSelectedItems(m_oldSelection ^ selectedItems);
1395     } else {
1396         m_selectionManager->setSelectedItems(selectedItems + m_oldSelection);
1397     }
1398 }
1399
1400 void KItemListController::startDragging()
1401 {
1402     if (!m_view || !m_model) {
1403         return;
1404     }
1405
1406     const KItemSet selectedItems = m_selectionManager->selectedItems();
1407     if (selectedItems.isEmpty()) {
1408         return;
1409     }
1410
1411     QMimeData *data = m_model->createMimeData(selectedItems);
1412     if (!data) {
1413         return;
1414     }
1415     KUrlMimeData::exportUrlsToPortal(data);
1416
1417     // The created drag object will be owned and deleted
1418     // by QApplication::activeWindow().
1419     QDrag *drag = new QDrag(QApplication::activeWindow());
1420     drag->setMimeData(data);
1421
1422     const QPixmap pixmap = m_view->createDragPixmap(selectedItems);
1423     drag->setPixmap(pixmap);
1424
1425     const QPoint hotSpot((pixmap.width() / pixmap.devicePixelRatio()) / 2, 0);
1426     drag->setHotSpot(hotSpot);
1427
1428     drag->exec(Qt::MoveAction | Qt::CopyAction | Qt::LinkAction, Qt::CopyAction);
1429
1430     QAccessibleEvent accessibilityEvent(view(), QAccessible::DragDropStart);
1431     QAccessible::updateAccessibility(&accessibilityEvent);
1432 }
1433
1434 KItemListWidget *KItemListController::hoveredWidget() const
1435 {
1436     Q_ASSERT(m_view);
1437
1438     const auto widgets = m_view->visibleItemListWidgets();
1439     for (KItemListWidget *widget : widgets) {
1440         if (widget->isHovered()) {
1441             return widget;
1442         }
1443     }
1444
1445     return nullptr;
1446 }
1447
1448 KItemListWidget *KItemListController::widgetForPos(const QPointF &pos) const
1449 {
1450     Q_ASSERT(m_view);
1451
1452     if (m_view->headerBoundaries().contains(pos)) {
1453         return nullptr;
1454     }
1455
1456     const auto widgets = m_view->visibleItemListWidgets();
1457     for (KItemListWidget *widget : widgets) {
1458         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1459         if (widget->contains(mappedPos) || widget->selectionRect().contains(mappedPos)) {
1460             return widget;
1461         }
1462     }
1463
1464     return nullptr;
1465 }
1466
1467 KItemListWidget *KItemListController::widgetForDropPos(const QPointF &pos) const
1468 {
1469     Q_ASSERT(m_view);
1470
1471     if (m_view->headerBoundaries().contains(pos)) {
1472         return nullptr;
1473     }
1474
1475     const auto widgets = m_view->visibleItemListWidgets();
1476     for (KItemListWidget *widget : widgets) {
1477         const QPointF mappedPos = widget->mapFromItem(m_view, pos);
1478         if (widget->contains(mappedPos)) {
1479             return widget;
1480         }
1481     }
1482
1483     return nullptr;
1484 }
1485
1486 void KItemListController::updateKeyboardAnchor()
1487 {
1488     const bool validAnchor =
1489         m_keyboardAnchorIndex >= 0 && m_keyboardAnchorIndex < m_model->count() && keyboardAnchorPos(m_keyboardAnchorIndex) == m_keyboardAnchorPos;
1490     if (!validAnchor) {
1491         const int index = m_selectionManager->currentItem();
1492         m_keyboardAnchorIndex = index;
1493         m_keyboardAnchorPos = keyboardAnchorPos(index);
1494     }
1495 }
1496
1497 int KItemListController::nextRowIndex(int index) const
1498 {
1499     if (m_keyboardAnchorIndex < 0) {
1500         return index;
1501     }
1502
1503     const int maxIndex = m_model->count() - 1;
1504     if (index == maxIndex) {
1505         return index;
1506     }
1507
1508     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1509
1510     // Calculate the index of the last column inside the row of the current index
1511     int lastColumnIndex = index;
1512     while ((!reversed && keyboardAnchorPos(lastColumnIndex + 1) > keyboardAnchorPos(lastColumnIndex))
1513            || (reversed && keyboardAnchorPos(lastColumnIndex + 1) < keyboardAnchorPos(lastColumnIndex))) {
1514         ++lastColumnIndex;
1515         if (lastColumnIndex >= maxIndex) {
1516             return index;
1517         }
1518     }
1519
1520     // Based on the last column index go to the next row and calculate the nearest index
1521     // that is below the current index
1522     int nextRowIndex = lastColumnIndex + 1;
1523     int searchIndex = nextRowIndex;
1524     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(nextRowIndex));
1525     while (searchIndex < maxIndex
1526            && ((!reversed && keyboardAnchorPos(searchIndex + 1) > keyboardAnchorPos(searchIndex))
1527                || (reversed && keyboardAnchorPos(searchIndex + 1) < keyboardAnchorPos(searchIndex)))) {
1528         ++searchIndex;
1529         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1530         if (searchDiff < minDiff) {
1531             minDiff = searchDiff;
1532             nextRowIndex = searchIndex;
1533         }
1534     }
1535
1536     return nextRowIndex;
1537 }
1538
1539 int KItemListController::previousRowIndex(int index) const
1540 {
1541     if (m_keyboardAnchorIndex < 0 || index == 0) {
1542         return index;
1543     }
1544
1545     const bool reversed = m_view->layoutDirection() == Qt::RightToLeft && m_view->scrollOrientation() == Qt::Vertical;
1546
1547     // Calculate the index of the first column inside the row of the current index
1548     int firstColumnIndex = index;
1549     while ((!reversed && keyboardAnchorPos(firstColumnIndex - 1) < keyboardAnchorPos(firstColumnIndex))
1550            || (reversed && keyboardAnchorPos(firstColumnIndex - 1) > keyboardAnchorPos(firstColumnIndex))) {
1551         --firstColumnIndex;
1552         if (firstColumnIndex <= 0) {
1553             return index;
1554         }
1555     }
1556
1557     // Based on the first column index go to the previous row and calculate the nearest index
1558     // that is above the current index
1559     int previousRowIndex = firstColumnIndex - 1;
1560     int searchIndex = previousRowIndex;
1561     qreal minDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(previousRowIndex));
1562     while (searchIndex > 0
1563            && ((!reversed && keyboardAnchorPos(searchIndex - 1) < keyboardAnchorPos(searchIndex))
1564                || (reversed && keyboardAnchorPos(searchIndex - 1) > keyboardAnchorPos(searchIndex)))) {
1565         --searchIndex;
1566         const qreal searchDiff = qAbs(m_keyboardAnchorPos - keyboardAnchorPos(searchIndex));
1567         if (searchDiff < minDiff) {
1568             minDiff = searchDiff;
1569             previousRowIndex = searchIndex;
1570         }
1571     }
1572
1573     return previousRowIndex;
1574 }
1575
1576 qreal KItemListController::keyboardAnchorPos(int index) const
1577 {
1578     const QRectF itemRect = m_view->itemRect(index);
1579     if (!itemRect.isEmpty()) {
1580         return (m_view->scrollOrientation() == Qt::Vertical) ? itemRect.x() : itemRect.y();
1581     }
1582
1583     return 0;
1584 }
1585
1586 void KItemListController::updateExtendedSelectionRegion()
1587 {
1588     if (m_view) {
1589         const bool extend = (m_selectionBehavior != MultiSelection);
1590         KItemListStyleOption option = m_view->styleOption();
1591         if (option.extendedSelectionRegion != extend) {
1592             option.extendedSelectionRegion = extend;
1593             m_view->setStyleOption(option);
1594         }
1595     }
1596 }
1597
1598 bool KItemListController::onPress(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons)
1599 {
1600     Q_EMIT mouseButtonPressed(m_pressedIndex.value_or(-1), buttons);
1601
1602     if (buttons & (Qt::BackButton | Qt::ForwardButton)) {
1603         // Do not select items when clicking the back/forward buttons, see
1604         // https://bugs.kde.org/show_bug.cgi?id=327412.
1605         return true;
1606     }
1607
1608     const QPointF pressedMousePos = m_view->transform().map(pos);
1609
1610     if (m_view->isAboveExpansionToggle(m_pressedIndex.value_or(-1), pressedMousePos)) {
1611         m_selectionManager->endAnchoredSelection();
1612         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1613         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1614         return true;
1615     }
1616
1617     m_selectionTogglePressed = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1618     if (m_selectionTogglePressed) {
1619         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1620         // The previous anchored selection has been finished already in
1621         // KItemListSelectionManager::setSelected(). We can safely change
1622         // the current item and start a new anchored selection now.
1623         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1624         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1625         return true;
1626     }
1627
1628     const bool shiftPressed = modifiers & Qt::ShiftModifier;
1629     const bool controlPressed = (modifiers & Qt::ControlModifier) || m_selectionMode; // Keeping selectionMode similar to pressing control will hopefully
1630                                                                                       // simplify the overall logic and possibilities both for users and devs.
1631     const bool leftClick = buttons & Qt::LeftButton;
1632     const bool rightClick = buttons & Qt::RightButton;
1633
1634     // The previous selection is cleared if either
1635     // 1. The selection mode is SingleSelection, or
1636     // 2. the selection mode is MultiSelection, and *none* of the following conditions are met:
1637     //    a) Shift or Control are pressed.
1638     //    b) The clicked item is selected already. In that case, the user might want to:
1639     //       - start dragging multiple items, or
1640     //       - open the context menu and perform an action for all selected items.
1641     const bool shiftOrControlPressed = shiftPressed || controlPressed;
1642     const bool pressedItemAlreadySelected = m_pressedIndex.has_value() && m_selectionManager->isSelected(m_pressedIndex.value());
1643     const bool clearSelection = m_selectionBehavior == SingleSelection || (!shiftOrControlPressed && !pressedItemAlreadySelected);
1644
1645     // When this method returns false, a rubberBand selection is created using KItemListController::startRubberBand via the caller.
1646     if (clearSelection) {
1647         const int selectedItemsCount = m_selectionManager->selectedItems().count();
1648         m_selectionManager->clearSelection();
1649         // clear and bail when we got an existing multi-selection
1650         if (selectedItemsCount > 1 && m_pressedIndex.has_value()) {
1651             const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1652             const auto mappedPos = row->mapFromItem(m_view, pos);
1653             if (pressedItemAlreadySelected || row->iconRect().contains(mappedPos) || row->textRect().contains(mappedPos)) {
1654                 // we are indeed inside the text/icon rect, keep m_pressedIndex what it is
1655                 // and short-circuit for single-click activation (it will then propagate to onRelease and activate the item)
1656                 // or we just keep going for double-click activation
1657                 if (m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced) {
1658                     if (!pressedItemAlreadySelected) {
1659                         // An unselected item was clicked directly while deselecting multiple other items so we select it.
1660                         m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1661                         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1662                         m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1663                     }
1664                     return true; // event handled, don't create rubber band
1665                 }
1666             } else {
1667                 // we're not inside the text/icon rect, as we've already cleared the selection
1668                 // we can just stop here and make sure handlers down the line (i.e. onRelease) don't activate
1669                 m_pressedIndex.reset();
1670                 // we don't stop event propagation and proceed to create a rubber band and let onRelease
1671                 // decide (based on m_pressedIndex) whether we're in a drag (drag => new rubber band, click => don't select the item)
1672                 return false;
1673             }
1674         }
1675     } else if (pressedItemAlreadySelected && !shiftOrControlPressed && leftClick) {
1676         // The user might want to start dragging multiple items, but if he clicks the item
1677         // in order to trigger it instead, the other selected items must be deselected.
1678         // However, we do not know yet what the user is going to do.
1679         // -> remember that the user pressed an item which had been selected already and
1680         //    clear the selection in mouseReleaseEvent(), unless the items are dragged.
1681         m_clearSelectionIfItemsAreNotDragged = true;
1682
1683         if (m_selectionManager->selectedItems().count() == 1 && m_view->isAboveText(m_pressedIndex.value_or(-1), pressedMousePos)) {
1684             Q_EMIT selectedItemTextPressed(m_pressedIndex.value_or(-1));
1685         }
1686     }
1687
1688     if (!shiftPressed) {
1689         // Finish the anchored selection before the current index is changed
1690         m_selectionManager->endAnchoredSelection();
1691     }
1692
1693     if (rightClick) {
1694         // Stop rubber band from persisting after right-clicks
1695         KItemListRubberBand *rubberBand = m_view->rubberBand();
1696         if (rubberBand->isActive()) {
1697             disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1698             rubberBand->setActive(false);
1699             m_view->setAutoScroll(false);
1700         }
1701
1702         if (!m_pressedIndex.has_value()) {
1703             // We have a right-click in an empty region, don't create rubber band.
1704             return true;
1705         }
1706     }
1707
1708     if (m_pressedIndex.has_value()) {
1709         // The hover highlight area of an item is being pressed.
1710         const auto row = m_view->m_visibleItems.value(m_pressedIndex.value()); // anything outside of row.contains() will be the empty region of the row rect
1711         const bool hitTargetIsRowEmptyRegion = !row->contains(row->mapFromItem(m_view, pos));
1712         // again, when this method returns false, a rubberBand selection is created as the event is not consumed;
1713         // createRubberBand here tells us whether to return true or false.
1714         bool createRubberBand = (hitTargetIsRowEmptyRegion && m_selectionManager->selectedItems().isEmpty());
1715
1716         if (rightClick && hitTargetIsRowEmptyRegion) {
1717             // We have a right click outside the icon and text rect but within the hover highlight area.
1718             // We don't want items to get selected through this, so we return now.
1719             return true;
1720         }
1721
1722         m_selectionManager->setCurrentItem(m_pressedIndex.value());
1723
1724         switch (m_selectionBehavior) {
1725         case NoSelection:
1726             break;
1727
1728         case SingleSelection:
1729             m_selectionManager->setSelected(m_pressedIndex.value());
1730             break;
1731
1732         case MultiSelection:
1733             if (controlPressed && !shiftPressed && leftClick) {
1734                 // A left mouse button press is happening on an item while control is pressed. This either means a user wants to:
1735                 // - toggle the selection of item(s) or
1736                 // - they want to begin a drag on the item(s) to copy them.
1737                 // We rule out the latter, if the item is not clicked directly and was unselected previously.
1738                 const auto row = m_view->m_visibleItems.value(m_pressedIndex.value());
1739                 const auto mappedPos = row->mapFromItem(m_view, pos);
1740                 if (!row->iconRect().contains(mappedPos) && !row->textRect().contains(mappedPos) && !pressedItemAlreadySelected) {
1741                     createRubberBand = true;
1742                 } else {
1743                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1744                     m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1745                     createRubberBand = false; // multi selection, don't propagate any further
1746                     // This will be the start of an item drag-to-copy operation if the user now moves the mouse before releasing the mouse button.
1747                 }
1748             } else if (!shiftPressed || !m_selectionManager->isAnchoredSelectionActive()) {
1749                 // Select the pressed item and start a new anchored selection
1750                 m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1751                 m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1752             }
1753             break;
1754
1755         default:
1756             Q_ASSERT(false);
1757             break;
1758         }
1759
1760         return !createRubberBand;
1761     }
1762
1763     return false;
1764 }
1765
1766 bool KItemListController::onRelease(const QPointF &pos, const Qt::KeyboardModifiers modifiers, const Qt::MouseButtons buttons, bool touch)
1767 {
1768     const QPointF pressedMousePos = pos;
1769     const bool isAboveSelectionToggle = m_view->isAboveSelectionToggle(m_pressedIndex.value_or(-1), pressedMousePos);
1770     if (isAboveSelectionToggle) {
1771         m_selectionTogglePressed = false;
1772         return true;
1773     }
1774
1775     if (!isAboveSelectionToggle && m_selectionTogglePressed) {
1776         m_selectionManager->setSelected(m_pressedIndex.value_or(-1), 1, KItemListSelectionManager::Toggle);
1777         m_selectionTogglePressed = false;
1778         return true;
1779     }
1780
1781     const bool controlPressed = modifiers & Qt::ControlModifier;
1782     const bool shiftOrControlPressed = modifiers & Qt::ShiftModifier || controlPressed;
1783
1784     const std::optional<int> index = m_view->itemAt(pos);
1785
1786     KItemListRubberBand *rubberBand = m_view->rubberBand();
1787     bool rubberBandRelease = false;
1788     if (rubberBand->isActive()) {
1789         disconnect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1790         rubberBand->setActive(false);
1791         m_oldSelection.clear();
1792         m_view->setAutoScroll(false);
1793         rubberBandRelease = true;
1794         // We check for actual rubber band drag here: if delta between start and end is less than drag threshold,
1795         // then we have a single click on one of the rows
1796         if ((rubberBand->endPosition() - rubberBand->startPosition()).manhattanLength() < QApplication::startDragDistance()) {
1797             rubberBandRelease = false; // since we're only selecting, unmark rubber band release flag
1798             // m_pressedIndex will have no value if we came from a multi-selection clearing onPress
1799             // in that case, we don't select anything
1800             if (index.has_value() && m_pressedIndex.has_value()) {
1801                 if (controlPressed && m_selectionBehavior == MultiSelection) {
1802                     m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Toggle);
1803                 } else {
1804                     m_selectionManager->setSelected(index.value());
1805                 }
1806                 if (!m_selectionManager->isAnchoredSelectionActive()) {
1807                     m_selectionManager->beginAnchoredSelection(index.value());
1808                 }
1809             }
1810         }
1811     }
1812
1813     if (index.has_value() && index == m_pressedIndex) {
1814         // The release event is done above the same item as the press event
1815
1816         if (m_clearSelectionIfItemsAreNotDragged) {
1817             // A selected item has been clicked, but no drag operation has been started
1818             // -> clear the rest of the selection.
1819             m_selectionManager->clearSelection();
1820             m_selectionManager->setSelected(m_pressedIndex.value(), 1, KItemListSelectionManager::Select);
1821             m_selectionManager->beginAnchoredSelection(m_pressedIndex.value());
1822         }
1823
1824         if (buttons & Qt::LeftButton) {
1825             bool emitItemActivated = true;
1826             if (m_view->isAboveExpansionToggle(index.value(), pos)) {
1827                 const bool expanded = m_model->isExpanded(index.value());
1828                 m_model->setExpanded(index.value(), !expanded);
1829
1830                 Q_EMIT itemExpansionToggleClicked(index.value());
1831                 emitItemActivated = false;
1832             } else if (shiftOrControlPressed && m_selectionBehavior != SingleSelection) {
1833                 // The mouse click should only update the selection, not trigger the item, except when
1834                 // we are in single selection mode
1835                 emitItemActivated = false;
1836             } else {
1837                 const bool singleClickActivation = m_view->style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick) || m_singleClickActivationEnforced;
1838                 if (!singleClickActivation) {
1839                     emitItemActivated = touch && !m_selectionMode;
1840                 } else {
1841                     // activate on single click only if we didn't come from a rubber band release
1842                     emitItemActivated = !rubberBandRelease;
1843                 }
1844             }
1845             if (emitItemActivated) {
1846                 Q_EMIT itemActivated(index.value());
1847             }
1848         } else if (buttons & Qt::MiddleButton) {
1849             Q_EMIT itemMiddleClicked(index.value());
1850         }
1851     }
1852
1853     m_pressedMouseGlobalPos = QPointF();
1854     m_pressedIndex = std::nullopt;
1855     m_clearSelectionIfItemsAreNotDragged = false;
1856     return false;
1857 }
1858
1859 void KItemListController::startRubberBand()
1860 {
1861     if (m_selectionBehavior == MultiSelection) {
1862         QPoint startPos = m_view->transform().map(m_view->scene()->views().first()->mapFromGlobal(m_pressedMouseGlobalPos.toPoint()));
1863         if (m_view->scrollOrientation() == Qt::Vertical) {
1864             startPos.ry() += m_view->scrollOffset();
1865         } else {
1866             startPos.rx() += m_view->scrollOffset();
1867         }
1868
1869         m_oldSelection = m_selectionManager->selectedItems();
1870         KItemListRubberBand *rubberBand = m_view->rubberBand();
1871         rubberBand->setStartPosition(startPos);
1872         rubberBand->setEndPosition(startPos);
1873         rubberBand->setActive(true);
1874         connect(rubberBand, &KItemListRubberBand::endPositionChanged, this, &KItemListController::slotRubberBandChanged);
1875         m_view->setAutoScroll(true);
1876     }
1877 }
1878
1879 void KItemListController::slotStateChanged(QScroller::State newState)
1880 {
1881     if (newState == QScroller::Scrolling) {
1882         m_scrollerIsScrolling = true;
1883     } else if (newState == QScroller::Inactive) {
1884         m_scrollerIsScrolling = false;
1885     }
1886 }
1887
1888 #include "moc_kitemlistcontroller.cpp"